Auto merge of #3286 - rjgoldsborough:build-script-docs-mistake-336, r=alexcrichton
authorbors <bors@rust-lang.org>
Tue, 15 Nov 2016 18:44:46 +0000 (10:44 -0800)
committerGitHub <noreply@github.com>
Tue, 15 Nov 2016 18:44:46 +0000 (10:44 -0800)
fixing build script docs mistakes

Fixes https://github.com/rust-lang/crates.io/issues/336


Trivial merge